Overview:
-Estimated achievement difficulty: 4/10
-Offline: 47 (1000)
-Online: 0
-Approximate amount of time to 1000: 25-30 Hours
-Minimum number of playthroughs needed: 3 (1 per difficulty)
-Number of missable achievements: 4. (Friend of the Woodland Realm, Friend to the Ring-bearer, Seeker, And The Lidless Eye)
-Do cheat codes disable achievements? No Cheat Codes
-Does difficulty affect achievements? Yes
-Glitchy achievements: None
-Unobtainable achievements? None
-Extra equipment needed? None
Introduction:
Lord of the Rings: War in the North is a fairly straightforward game achievement-wise. You need to play through the entire campaign three times, and can choose one of three classes to play as, switching between them whenever you like. Your equipment does not transfer between the characters, but your potions inventory and level does.
Thank you to undoingduck for his original guide. It was good but he never quite finished it and I still had to look a number of things up to help myself get the 1000, so I felt I should update it with that info. Much of the work here was his.
Step 1: Normal Difficulty
Start playing as the Lore-Master to get the Herb-master achievement, then when you have unlocked that, wait for an auto-save then quit to the menu and switch to the Ranger. Use the Ranger for the rest of this playthrough to unlock Seeker as well as all the story related achievements, and work on the one collectible achievement Cult of the Lidless Eye.
Make sure to also keep any set pieces to eventually unlock Well-arrayed - I got my final piece of Alliance halfway through my second playthrough, so don't fret if you don't get it in this step.
Also make sure you speak to Frodo once you reach Rivendell, find the kidnapped elf when you reach Mirkwood, and do not use the eagle during the final battle to knock out the rest of the missable achievements.
Step 2: Heroic Difficulty
Once you complete the game you will enter New Game+ and carry over your level to the next difficulty. You will want to switch to the Champion now. When you start the game, put most of his skill points into Dexterity and Stamina, then choose all the skills that will affect the Explosive Bolt skill. This skill will one-shot any normal enemy, and in large groups to boot. It should only take 2-3 shots for trolls and 4-5 for any boss. This will make the game smooth sailing.
Step 3: Legendary Difficulty
Same process as Step 2. Spam Explosive Bolt and profit.
Step 4: Strength of Our Alliance
Head over to the Achievement Trading Thread to get some help with this. While it is technically possible to unlock with the AI, I never got it to work.
Conclusion:
Your final two playthroughs of the game will be extremely fast and painless, so once you've been thorough and got through Step 1, you'll be very close to finishing the full 1000G. Good luck!
[x360a would like to thank The Pants Party for this road map]